1231321412 has 6 divisors (see below), whose sum is σ = 2154812478. Its totient is φ = 615660704.

The previous prime is 1231321381. The next prime is 1231321451. The reversal of 1231321412 is 2141231321.

It can be written as a sum of positive squares in only one way, i.e., 1160492356 + 70829056 = 34066^2 + 8416^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153915173 + ... + 153915180.

It is an arithmetic number, because the mean of its divisors is an integer number (359135413).

Almost surely, 2^1231321412 is an apocalyptic number.

It is an amenable number.

1231321412 is a deficient number, since it is larger than the sum of its proper divisors (923491066).

1231321412 is a wasteful number, since it uses less digits than its factorization.

1231321412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307830357 (or 307830355 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1231321412 is about 35090.1896831579. The cubic root of 1231321412 is about 1071.8248221681.

Adding to 1231321412 its reverse (2141231321), we get a palindrome (3372552733).

Subtracting 1231321412 from its reverse (2141231321), we obtain a palindrome (909909909).

The spelling of 1231321412 in words is "one billion, two hundred thirty-one million, three hundred twenty-one thousand, four hundred twelve".